A device transfers energy for 2 hours. In an equation to calculate the power of the device, the value for t should be ... 120
2
720
7200

7200 secs

Explanation:

Power is the rate at which work is done. Mathematically, it is represented as:

Power (P) = Energy (E) /Time (t)

P = E/t

Power is measured in Watt (W).

Energy is measured in Joule (J).

Time is measured in seconds (s).

In calculating for the power, we must expresed the energy in joules and the time in seconds.

For the question given above, we must convert 2 hours to seconds before calculating the power.

To convert from hours to seconds, we simply do the following:

1 hr = 3600 secs

Therefore,

2 hrs = 2 x 3600 = 7200 secs

Therefore, the value for the time, t will be 7200 secs.

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